to sunlight for too much time, as the doctors say, will do harm to one's skin.  [ ]

A. Being exposed                      

B. Having exposed  

C. Exposed                          

D. After being exposed

商业银行应遵循的经营原则包括（）

A、安全性

B、流动性

C、盈利性

D、多样性

E、有效性